Shoutbox

Click on your profile, across from Posts click "Find", look for the post and click on it, when you do, make sure you don't scroll and it will automatically find your post (the closer to the top the newer the post).

Another method can be to click Search, at the top of any forum page then.
- Type in the name of the thread in keywords
- Type your username in the username field
- On "Search In" select subjects
- Click Search.

Now select the post you wish to view (the closer to the top the newer the post), and do not scroll while the page loads, and it will move the page to the exact post.

It's not exactly what you want (as it takes slightly longer) but it gets the same results.